Update (March 2012): Max Rice has generously updated the Excel Geocoding Tool. It is shared on Github here.
I’m happy to announce a few small revisions to our Excel geocoding tool. The tool takes a list of addresses and will look up the latitude and longitude of those addresses. The addresses can then be exported as a Google Earth map.

A user pointed out that the tool wasn’t looking up zip+4 codes properly in Yahoo and this problem is fixed along. Also, I’m sorry to report that Yahoo has lowered their limit of free geocodes to 5,000 per day from 50,000 per day.